Episode list

The Octonauts try to pull Peso out of an oceanic trench and get some help from a strange-looking creature with a see-through head: a Spookfish.

When Captain Barnacles and Peso get lost in the icy Arctic sea, a pod of Orcas help the Octonauts find them.

Kwazii searches the shipwreck of his pirate grandfather for his gold spyglass. It's guarded by blind hagfish, but their slime unexpectedly helps him when he gets stuck. Kwazii leaves the spyglass because it's now the home of sea creatures.

When Peso and the Octonauts aid an enormous Elephant Seal, he overstays his welcome in the Octopod.

The Octonauts must work together as a team to help a lost sardine find her school.

When the Octonauts all pitch in to help save a sick coral reef, they get some unexpected help from a pod of playful dolphins.

The Octonauts travel up a treacherous river to help a young migrating eel on her difficult journey.

The team are preparing for a feast of red seaweed on the Galapagos Islands but a trio of salt-sneezing Marine Iguanas raid the Octopod and eat it all.

Down in the darkness of the ocean deep, Peso and the Octonauts must help a tiny, injured dwarf lanternshark. But they have to find him first.

Kwazii discovers Calico Jack's Parrot Island treasure map behind an old photo. Whilst looking for the island they meet a parrotfish, who helps them clear away dense algae and hide from vicious moray eels.

Some electric torpedo rays give the Octopod a jump-start when its batteries go flat during a trip to see Tweak's pal, Sandy the leatherback sea turtle.

Captain Barnacles allows Tunip to use his Octo-compass. But when Tunip loses it, a Cuttlefish takes it.

The Octonauts have their hands full as they look after a headstrong young Lemon Shark who's hurt his nose and can't find his way home.

The Octopod's waterworks become flooded with frightened Humuhumu fish. The Octonauts must find a way to flush them out.

Humuhumus: When the Octopod's waterworks are flooded with frightened Humuhumu fish, the Octonauts have to find a way to flush them out! Giant Spider Crab: Kwazii is spooked when he spots what looks like a giant underwater spider! But it turns out to be a very old Spider Crab who needs the Octonauts' help!

The Octonauts travel to Professor Inkling's childhood home for Christmas, an undersea mountain. But they discover that a rock slide has endangered the local creatures - including a rare species of golden coral, and Inkling's little octopus nephew, Squirt! With the help of Tweak's latest invention, the Gup X, the Octonauts must rescue the creatures and save Christmas.